Trailer wiring
04-13-2009, 01:20 PM
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Trailer wiring
Has anyone wired for a simple trailer on a B7? I want to tow a small trailer with a 4 prong lead (brake lights and turn signals).
I assume that the extra power draw will freak out the can-bus if not done right??
I assume that the extra power draw will freak out the can-bus if not done right??
04-14-2009, 05:48 AM
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good luck! quoted about $400+ just to do the wiring another 260 to install the hitch, from both indy places, audi, and a trailer shops. I have a small trailer and snowmobile (less than 1000lbs combined) i wanted to tow, and can't justify the $660+ for one more winter. lease ends in april, just going to buy out the last 3/4 mo's and get an suv.
but please post if you find a cheaper way...
but please post if you find a cheaper way...
04-16-2009, 05:51 AM
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05-16-2009, 11:49 AM
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Tech article posted
I posted the tech article on how to wire up the trailer. Here's my Audi in action towing a large load! It's more then adequate for light duty hauling---better than buying a pickup.
05-18-2009, 05:05 AM
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I just went to U-Haul to have them install a hitch plus wiring on my A4 Avant (B7). Total cost will be ~$250 for the hitch (installed), plus the wiring, maybe ~100 (I'm still waiting for the part to come in).
Turns out the wiring on the Avant is different than on the sedan and requires a special adapter. Seems that the Avant uses a single wire to control all the light functions (marker, turn signal, and brake) but with different resistance across the wire for each of the functions. Generally different wires are used for the functions. The U-Haul guys told me the sedan is easy (they had already done a few earlier in the month), but the Avant is hard (because they didn't have the correct part). Also the manufacturer (Drawtite) listed the incorrect part in their spec sheet which added to the confusion.
My advice is to be careful, make sure you get exactly the correct parts, and do not assume that what works on one model will work on the other.
Turns out the wiring on the Avant is different than on the sedan and requires a special adapter. Seems that the Avant uses a single wire to control all the light functions (marker, turn signal, and brake) but with different resistance across the wire for each of the functions. Generally different wires are used for the functions. The U-Haul guys told me the sedan is easy (they had already done a few earlier in the month), but the Avant is hard (because they didn't have the correct part). Also the manufacturer (Drawtite) listed the incorrect part in their spec sheet which added to the confusion.
My advice is to be careful, make sure you get exactly the correct parts, and do not assume that what works on one model will work on the other.
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02-20-2010, 06:18 AM
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I just went to U-Haul to have them install a hitch plus wiring on my A4 Avant (B7). Total cost will be ~$250 for the hitch (installed), plus the wiring, maybe ~100 (I'm still waiting for the part to come in).
Turns out the wiring on the Avant is different than on the sedan and requires a special adapter. Seems that the Avant uses a single wire to control all the light functions (marker, turn signal, and brake) but with different resistance across the wire for each of the functions. Generally different wires are used for the functions. The U-Haul guys told me the sedan is easy (they had already done a few earlier in the month), but the Avant is hard (because they didn't have the correct part). Also the manufacturer (Drawtite) listed the incorrect part in their spec sheet which added to the confusion.
My advice is to be careful, make sure you get exactly the correct parts, and do not assume that what works on one model will work on the other.
Turns out the wiring on the Avant is different than on the sedan and requires a special adapter. Seems that the Avant uses a single wire to control all the light functions (marker, turn signal, and brake) but with different resistance across the wire for each of the functions. Generally different wires are used for the functions. The U-Haul guys told me the sedan is easy (they had already done a few earlier in the month), but the Avant is hard (because they didn't have the correct part). Also the manufacturer (Drawtite) listed the incorrect part in their spec sheet which added to the confusion.
My advice is to be careful, make sure you get exactly the correct parts, and do not assume that what works on one model will work on the other.
06-03-2010, 03:33 PM
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06-07-2010, 10:38 AM
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